Normal sudoku rules apply. Digits may not repeat in a cage. The totals of cages an equal distance from the central cage along a lavender line must sum to the total of the central cage. Eg For the line beginning in r7c1 there are five cages along the line left-to-right; labelling these cages A, B, C, D & E, the central cage C (comprising r8c5&r8c6) sums to the same as the cells in cages B+D and the same as the cages A+E. The digit in the cell marked with a square is even.